| Message ID | 1568194890-24439-3-git-send-email-stanley.chu@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v1,1/3] scsi: core: allow auto suspend override by low-level driver | expand |
> > Rework from previous work by: > Sujit Reddy Thumma <sthumma@codeaurora.org> > > Override auto suspend tunables for UFS device LUNs during initialization so > as to efficiently manage background operations and the power consumption. > > Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> > --- > drivers/scsi/ufs/ufshcd.c | 8 ++++++++ drivers/scsi/ufs/ufshcd.h | 10 > ++++++++++ > 2 files changed, 18 insertions(+) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index > 30b752c61b97..d253a018a73b 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -88,6 +88,9 @@ > /* Interrupt aggregation default timeout, unit: 40us */ > #define INT_AGGR_DEF_TO 0x02 > > +/* default delay of autosuspend: 2000 ms */ #define Typo? > +RPM_AUTOSUSPEND_DELAY_MS 2000 > + > #define ufshcd_toggle_vreg(_dev, _vreg, _on) \ > ({ \ > int _ret; \ > @@ -4612,9 +4615,14 @@ static int ufshcd_change_queue_depth(struct > scsi_device *sdev, int depth) > */ > static int ufshcd_slave_configure(struct scsi_device *sdev) { > + struct ufs_hba *hba = shost_priv(sdev->host); > struct request_queue *q = sdev->request_queue; > > blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1); > + > + if (ufshcd_is_rpm_autosuspend_allowed(hba)) > + sdev->rpm_autosuspend_delay = > RPM_AUTOSUSPEND_DELAY_MS; > + > return 0; > } > > diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index > a43c7135f33d..99ea416519af 100644 > --- a/drivers/scsi/ufs/ufshcd.h > +++ b/drivers/scsi/ufs/ufshcd.h > @@ -714,6 +714,12 @@ struct ufs_hba { > * the performance of ongoing read/write operations. > */ > #define UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND (1 > << 5) > + /* > + * This capability allows host controller driver to automatically > + * enable runtime power management by itself instead of waiting > + * for userspace to control the power management. > + */ > +#define UFSHCD_CAP_RPM_AUTOSUSPEND (1 << 6) > > struct devfreq *devfreq; > struct ufs_clk_scaling clk_scaling; @@ -747,6 +753,10 @@ static inline > bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba) { > return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND; } > +static inline bool ufshcd_is_rpm_autosuspend_allowed(struct ufs_hba > +*hba) { > + return hba->caps & UFSHCD_CAP_RPM_AUTOSUSPEND; } > > static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba) { > -- > 2.18.0
Hi Avri, > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index > > 30b752c61b97..d253a018a73b 100644 > > --- a/drivers/scsi/ufs/ufshcd.c > > +++ b/drivers/scsi/ufs/ufshcd.c > > @@ -88,6 +88,9 @@ > > /* Interrupt aggregation default timeout, unit: 40us */ > > #define INT_AGGR_DEF_TO 0x02 > > > > +/* default delay of autosuspend: 2000 ms */ #define > Typo? > This is wired because it looks fine in both my local patch and in patchwork website: https://patchwork.kernel.org/patch/11140759/ Anyway I will try to fix and check it carefully in v2. Thanks, Stanley
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 30b752c61b97..d253a018a73b 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -88,6 +88,9 @@ /* Interrupt aggregation default timeout, unit: 40us */ #define INT_AGGR_DEF_TO 0x02 +/* default delay of autosuspend: 2000 ms */ +#define RPM_AUTOSUSPEND_DELAY_MS 2000 + #define ufshcd_toggle_vreg(_dev, _vreg, _on) \ ({ \ int _ret; \ @@ -4612,9 +4615,14 @@ static int ufshcd_change_queue_depth(struct scsi_device *sdev, int depth) */ static int ufshcd_slave_configure(struct scsi_device *sdev) { + struct ufs_hba *hba = shost_priv(sdev->host); struct request_queue *q = sdev->request_queue; blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1); + + if (ufshcd_is_rpm_autosuspend_allowed(hba)) + sdev->rpm_autosuspend_delay = RPM_AUTOSUSPEND_DELAY_MS; + return 0; } diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index a43c7135f33d..99ea416519af 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -714,6 +714,12 @@ struct ufs_hba { * the performance of ongoing read/write operations. */ #define UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND (1 << 5) + /* + * This capability allows host controller driver to automatically + * enable runtime power management by itself instead of waiting + * for userspace to control the power management. + */ +#define UFSHCD_CAP_RPM_AUTOSUSPEND (1 << 6) struct devfreq *devfreq; struct ufs_clk_scaling clk_scaling; @@ -747,6 +753,10 @@ static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba) { return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND; } +static inline bool ufshcd_is_rpm_autosuspend_allowed(struct ufs_hba *hba) +{ + return hba->caps & UFSHCD_CAP_RPM_AUTOSUSPEND; +} static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba) {
Rework from previous work by: Sujit Reddy Thumma <sthumma@codeaurora.org> Override auto suspend tunables for UFS device LUNs during initialization so as to efficiently manage background operations and the power consumption. Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> --- drivers/scsi/ufs/ufshcd.c | 8 ++++++++ drivers/scsi/ufs/ufshcd.h | 10 ++++++++++ 2 files changed, 18 insertions(+)